[Grml] grml-small as Xen guest (DomU)

Hi I would like to use grml-small as a guest os under xen (Dom U). What is the recommended procedure to do this ? Do I have to start with something like xen-linux-system-2.6.26-1-xen-686 or a bare debian appliance from jailtime.org and install grml on that ? Or is there something like xxx-grml-xen-xxx ?

Thanks for your help Peter